What conditions must be met for an object to be weightless?

in a lift if an object is moving with acceleration same as acc. due to gravity then apparent weight is 0. so it seems object is weightless.

or else I dunno maybe in space

technically you will be weightless when no force acts on you

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

fe 55.85 g/mol and h2o 18.02 g/mol.